HBASE-25594 graceful_stop.sh fails to unload regions when ran at localhost

Author: Javier

bin/graceful_stop.sh

@@ -103,7 +103,7 @@ hostname=$1
 filename="/tmp/$hostname"
 
 local=
-localhostname=`/bin/hostname`
+localhostname=`/bin/hostname -f`
 
 if [ "$localhostname" == "$hostname" ]; then
   local=true